Results 251 to 260 of about 55,690 (303)
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Computer Graphics, 1984
Ray tracing is one of the most elegant techniques in computer graphics. Many phenomena that are difficult or impossible with other techniques are simple with ray tracing, including shadows, reflections, and refracted light. Ray directions, however, have been determined precisely, and this has limited the capabilities of ray tracing.
Robert L. Cook 0001 +2 more
exaly +2 more sources
Ray tracing is one of the most elegant techniques in computer graphics. Many phenomena that are difficult or impossible with other techniques are simple with ray tracing, including shadows, reflections, and refracted light. Ray directions, however, have been determined precisely, and this has limited the capabilities of ray tracing.
Robert L. Cook 0001 +2 more
exaly +2 more sources
Computer Graphics, 1984
A new approach to ray tracing is introduced. The definition of a “ray” is extended into a cone by including information on the spread angle and the virtual origin. The advantages of this approach, which tries to model light propagation with more fidelity, include a better method of anti-aliasing, a way of calculating fuzzy shadows and dull reflections,
exaly +2 more sources
A new approach to ray tracing is introduced. The definition of a “ray” is extended into a cone by including information on the spread angle and the virtual origin. The advantages of this approach, which tries to model light propagation with more fidelity, include a better method of anti-aliasing, a way of calculating fuzzy shadows and dull reflections,
exaly +2 more sources
ACM SIGGRAPH 2005 Courses on - SIGGRAPH '05, 2005
Ray tracing is a method to produce realistic images; it determines visible surfaces in an image at the pixel level (Appel, 1968; Kay & Greenberg, 1979; Whitted, 1980). Unlike the z-buffer and BSP tree, ray tracing operates pixel-by-pixel rather than primitive-by-primitive.
+4 more sources
Ray tracing is a method to produce realistic images; it determines visible surfaces in an image at the pixel level (Appel, 1968; Kay & Greenberg, 1979; Whitted, 1980). Unlike the z-buffer and BSP tree, ray tracing operates pixel-by-pixel rather than primitive-by-primitive.
+4 more sources
Journal of Graphics, GPU, and Game Tools, 2009
Despite nearly universal support for the IEEE 754 floating-point standard on modern general-purpose processors, a wide variety of more specialized processors do not provide hardware floating-point units and rely instead on integer-only pipelines. Ray tracing on these platforms thus requires an integer rendering process.
Jared Heinly +4 more
openaire +1 more source
Despite nearly universal support for the IEEE 754 floating-point standard on modern general-purpose processors, a wide variety of more specialized processors do not provide hardware floating-point units and rely instead on integer-only pipelines. Ray tracing on these platforms thus requires an integer rendering process.
Jared Heinly +4 more
openaire +1 more source
IEEE Computer Graphics and Applications, 1990
Ray-tracing methods are extended to include the mirage effect. This is accomplished by simulating atmospheric variations. Different air layers are distinguished in modeling the continuous spectrum of temperature change, each layer being assigned a refractive index, which causes a penetrating light ray to bend in accordance with Snell's law of ...
Marc Berger, Terry Trout, Nancy Levit
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Ray-tracing methods are extended to include the mirage effect. This is accomplished by simulating atmospheric variations. Different air layers are distinguished in modeling the continuous spectrum of temperature change, each layer being assigned a refractive index, which causes a penetrating light ray to bend in accordance with Snell's law of ...
Marc Berger, Terry Trout, Nancy Levit
openaire +1 more source
IEEE Computer Graphics and Applications, 1992
Discrete ray tracing, or 3-D raster ray tracing (RRT), which, unlike existing ray tracing methods that use geometric representation for the 3-D scene employs a 3-D discrete raster of voxels for representing the 3-D scene in the same way a 2-D raster of pixels represents a 2-D image, is discussed.
Roni Yagel +2 more
openaire +1 more source
Discrete ray tracing, or 3-D raster ray tracing (RRT), which, unlike existing ray tracing methods that use geometric representation for the 3-D scene employs a 3-D discrete raster of voxels for representing the 3-D scene in the same way a 2-D raster of pixels represents a 2-D image, is discussed.
Roni Yagel +2 more
openaire +1 more source
Computer Graphics Forum, 1993
AbstractWe are going to present a survey of techniques using temporal coherence in between frames to render animation sequences with ray tracing. A new method using temporal coherence in the ray space (lightpath of rays) is proposed. The goal of this technique is to factorize intersection and illumination calculations over the frames of the sequence ...
Hervé Maurel, Yves Duthen, René Caubet
openaire +1 more source
AbstractWe are going to present a survey of techniques using temporal coherence in between frames to render animation sequences with ray tracing. A new method using temporal coherence in the ray space (lightpath of rays) is proposed. The goal of this technique is to factorize intersection and illumination calculations over the frames of the sequence ...
Hervé Maurel, Yves Duthen, René Caubet
openaire +1 more source
Communications of the ACM, 2013
The NVIDIA® OptiX™ ray tracing engine is a programmable system designed for NVIDIA GPUs and other highly parallel architectures. The OptiX engine builds on the key observation that most ray tracing algorithms can be implemented using a small set of programmable operations.
Steven G. Parker +11 more
openaire +1 more source
The NVIDIA® OptiX™ ray tracing engine is a programmable system designed for NVIDIA GPUs and other highly parallel architectures. The OptiX engine builds on the key observation that most ray tracing algorithms can be implemented using a small set of programmable operations.
Steven G. Parker +11 more
openaire +1 more source
The Visual Computer, 1993
In this paper, we describe a method to create an approximate ray-traced stereoscopic pair by transforming a fully raytraced left-eye view into an inferred right-eye view. Performance results from evaluating several random scenes, which indicate that the second view in a stereoscopic image can be computed with as little as 5% of the effort required to ...
Stephen J. Adelson, Larry F. Hodges
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In this paper, we describe a method to create an approximate ray-traced stereoscopic pair by transforming a fully raytraced left-eye view into an inferred right-eye view. Performance results from evaluating several random scenes, which indicate that the second view in a stereoscopic image can be computed with as little as 5% of the effort required to ...
Stephen J. Adelson, Larry F. Hodges
openaire +1 more source